2021206683 has 16 divisors (see below), whose sum is σ = 2714291840. Its totient is φ = 1337814144.

The previous prime is 2021206679. The next prime is 2021206697. The reversal of 2021206683 is 3866021202.

It is not a de Polignac number, because 2021206683 - 2² = 2021206679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021206683.

It is not an unprimeable number, because it can be changed into a prime (2021206613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712035 + ... + 714867.

It is an arithmetic number, because the mean of its divisors is an integer number (169643240).

Almost surely, 2^2021206683 is an apocalyptic number.

2021206683 is a deficient number, since it is larger than the sum of its proper divisors (693085157).

2021206683 is a wasteful number, since it uses less digits than its factorization.

2021206683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2021206683 is about 44957.8322764788. The cubic root of 2021206683 is about 1264.3585270131.

Adding to 2021206683 its reverse (3866021202), we get a palindrome (5887227885).

The spelling of 2021206683 in words is "two billion, twenty-one million, two hundred six thousand, six hundred eighty-three".